Holland, J., & Leslie, D. (2018). Tour operators and operations: Development, management and responsibility. CABI.
Chicago Style (17. basım) AtıfHolland, Jakki, ve David Leslie. Tour Operators and Operations: Development, Management and Responsibility. Wallingford, Oxfordshire: CABI, 2018.
MLA (9th ed.) AtıfHolland, Jakki, ve David Leslie. Tour Operators and Operations: Development, Management and Responsibility. CABI, 2018.
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